> the now largely discredited idea that the atom bomb attack is what caused the Japanese to surrender

Do you have a source for this? I just spent 10 minutes searching, and I could find nothing compelling. The closest I could find was Racing the Enemy, which argues that it was the planned Soviet invasion that pushed the Japanese to surrender. But otherwise, the story seems a lot more complex than that, and is certainly nowhere near "discredited" to suggest the atom bomb caused the Japanese to surrender.

Further reading (and these themselves contain references to even further reading):

https://old.reddit.com/r/AskHistorians/comments/1505pek/was_...

https://old.reddit.com/r/AskHistorians/comments/15gsdme/i_un...

https://old.reddit.com/r/AskHistorians/comments/wwa2ie/were_...

https://old.reddit.com/r/AskHistorians/comments/cawabr/were_...